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.Management Sciences
A. eddy current losses = stray losses
B. hysteresis losses = eddy current losses
C. copper losses = 0
D. variable losses = constant losses
Related Mcqs:
- For starting a D.C. motor a starter is required because___________?
- A. it limits the speed of the motor B. it limits the starting current to a safe value C. it starts the motor D. none of the above...
- Which of the following law/rule can he used to determine the direction of rotation of D.C. motor ?
- A. Lenz’s law B. Faraday’s law C. Coloumb’s law D. Fleming’s left-hand rule...
- In D.C. machines the residual magnetism is of the order of_________________?
- A. 2 to 3 per cent B. 10 to 15 per cent C. 20 to 25 per cent D. 50 to 75 per cent...
- For constant torque drive which speed control method is preferred ?
- A. Field control B. Armature voltage control C. Shunt armature control D. Mechanical loading system...
- The speed of a D.C. shunt motor is required to be more than full load speed. This is possible by______________?
- A. reducing the field current B. decreasing the armature current C. increasing the armature current D. increasing the excitation current E. none of the above methods...
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